Peri-implant stress distribution in maxillary All-on-4 prosthesis fabricated on multi-unit angled abutment with cobalt chromium framework versus those with titanium framework: A 3D Finite Element Analysis | ||
| Egyptian Dental Journal | ||
| Volume 70, Issue 4, October 2024, Pages 3391-3398 PDF (1.03 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2024.293793.3065 | ||
| Authors | ||
| David Sami Tawfik* 1; Amr Naguib2; Mohamed Farouk Abdallah3; Mohammad Abdelmonem Nada4 | ||
| 1MSc, Master Candidate, Master Implantology, Faculty of Dentistry, Cairo University | ||
| 2Lecturer, Department of Prosthodontics, Faculty of Dentistry, Cairo University, Egypt | ||
| 3Professor, Department of Prosthodontics, Faculty of Dentistry, Cairo University; Professor, Department of Prosthodontics, Faculty of Dentistry, Galala University, Egypt | ||
| 4Professor, Department of Prosthodontics, Faculty of Dentistry, Cairo University, Egypt | ||
| Abstract | ||
| Abstract Aim: To use finite element analysis to evaluate the peri-implant stresses caused by the cobalt-chromium and titanium frameworks for maxillary all on four prostheses. Material and methods: Three-dimensional finite elements modeling of an edentulous maxilla restored with a hybrid fixed prosthesis supported by four implants was done for this study. Anterior implants were placed vertically and bilaterally in the lateral-canine area. At the second premolar region, posterior implants were placed with a 17-degree distal angulation. Every implant featured a multi-unit abutment. The titanium framework for the first model was designed, and the cobalt-chromium framework for the second model was proposed. Results: Von Mises stress, maximum stress, and directional deformation were assessed in the peri-implant bone area. Von Mises stresses on the screw-retained prosthesis were very similar in cobalt chromium and titanium frameworks compared to the underlying bone and implants. Conclusion: For edentulous maxilla, the use of titanium or cobalt-chromium frameworks in conjunction with an all-on-four prosthesis is regarded as a dependable therapeutic alternative. | ||
| Keywords | ||
| Finite Element Analysis; Multi unit abutment; Framework Design; Von Misses stress; Maximum principal stress | ||
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